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Polyethylene resin for secondary battery separator and secondary battery separator comprising same

A polyethylene resin and secondary battery technology, applied in battery pack parts, circuits, electrical components, etc., can solve problems such as difficult to melt resin, achieve the effect of improving pore characteristics, promoting penetration or absorption

Active Publication Date: 2021-06-22
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, it is difficult to melt the resin uniformly in the extruder
Therefore, it is increasingly challenging to melt uniformly and suppress defects caused by unmelted parts in the extruder

Method used

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  • Polyethylene resin for secondary battery separator and secondary battery separator comprising same
  • Polyethylene resin for secondary battery separator and secondary battery separator comprising same
  • Polyethylene resin for secondary battery separator and secondary battery separator comprising same

Examples

Experimental program
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preparation example Construction

[0041] Preparation method of polyethylene resin

[0042] The polyethylene resin of the present disclosure may be manufactured by polymerizing a polyethylene resin using a catalyst for polymerizing polyethylene according to an embodiment and performing a powder production process.

[0043] Preparation of Polyethylene Polymerization Catalyst

[0044] According to one embodiment, the method for preparing a catalyst for polymerizing polyethylene comprises the steps of:

[0045] (1) preparing magnesium compound solution by reacting magnesium compound, alcohol and hydrocarbon solvent;

[0046] (2) Prepare the precursor by adding titanium tetrachloride to the magnesium compound solution for reaction;

[0047] (3) prepare the catalyst by reacting a precursor with titanium tetrachloride and a carbonyl compound;

[0048] Wherein the magnesium compound may be a magnesium halide compound, such as a magnesium chloride compound, such as magnesium dichloride (MgCl 2 ).

[0049] The hydr...

Embodiment 1

[0085]Preparation of solid catalyst for polyethylene production: Catalyst A

[0086] Step 1: Preparation of Magnesium Halide Compound Solution

[0087] The reactor of 1L volume that will be equipped with mechanical stirrer is placed under nitrogen atmosphere, the magnesium dichloride (MgCl 2 ), 300ml of toluene and 100ml of n-butanol were injected into the reactor, and the temperature was raised to 65° C. for one hour, and then the reaction was maintained for 2 hours, thereby obtaining a uniform magnesium halide compound solution.

[0088] Step 2: Preparation of solid composite titanium catalyst

[0089] The temperature of the magnesium halide compound solution prepared in step 1 was cooled to 40 °C, and 70 ml of TiCl 4 Feed slowly into the reactor for one hour. After the feed was complete, the temperature of the reactor was raised to 60° C. for one hour while stirring at 350 rpm, followed by aging for one hour. After completion of all processes, the reactor was allowed to...

Embodiment 2

[0105] Preparation of solid catalyst for polyethylene production: Catalyst A

[0106] Catalyst A was prepared under the same conditions as in Example 1.

[0107] Production of Polyethylene Resin Powder: Polymerization Conditions (b)

[0108] Polymerization was carried out under substantially the same conditions as in Example 1, except that the reaction pressure was changed from 5kgf / cm 2 Increased to 6kgf / cm 2 , and the residence time was shortened from 2.5 hours to 2 hours.

[0109] Formation of porous membranes for secondary batteries

[0110] Porous membranes were molded under substantially the same molding conditions as in Example 1, except that the ratio of diluent oil to resin was changed from 6:4 to 7:3.

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Abstract

The present disclosure relates to a polyethylene resin for a secondary battery separator, a secondary battery separator comprising the same, and a secondary battery comprising the separator. The polyethylene resin of the present disclosure is characterized by a pore volume of 0.5 ml / g to 1.5 ml / g as measured by mercury intrusion method, a pore area of 4 m2 / g to 10 m2 / g, an average pore diameter of 0.3 [mu] m to 1.0 [mu] m, and a porosity of 50% to 60%.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2019-0170263 filed on December 18, 2019 at the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to a polyethylene resin for a secondary battery separator, a secondary battery separator including the polyethylene resin, and a secondary battery including the separator. The polyethylene resin can secure excellent mechanical strength of a porous separator as a molded product by improving extrusion processability. Background technique [0004] Ultra-high molecular weight polyethylene (UHMWPE) usually refers to a molecular weight of at least 10 6 g / mol polyethylene, and can be subdivided into molecular weight greater than or equal to 3×10 6 g / mol ultra-high molecular weight polyethylene and molecular weight not greater than 3×10 6 ...

Claims

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Application Information

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IPC IPC(8): C08F110/02C08F4/651C08F4/654C08J5/18C08L23/06C08K5/134C08K5/526C08K5/098H01M50/417
CPCC08F110/02C08J5/18C08K5/1345C08K5/526C08K5/098C08J2323/06C08F4/651C08F4/6543C08F2500/01C08F2500/12C08F2500/18C08F2500/17C08F2500/26Y02E60/10C08F10/02C08F4/6435C08F4/6494H01M50/411H01M50/403
Inventor 韩在爀金东镇韩礼恩李镇佑朴智溶
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD